Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
William H. Jeselun, O.D.
Optometrist in Wauwatosa, WI · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1356421804
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Registry record
Entity type Individual (Type 1)
Name William H. Jeselun
Credential O.D.
Sex Male
Practice address 2500 N Mayfair Rd, Wauwatosa, WI, 53226
Phone (414) 453-2866
Fax (414) 453-0730
Enumeration date Oct 17, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
What is the NPI number for William Jeselun?
The National Provider Identifier (NPI) for William Jeselun is 1356421804, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Jeselun practice?
The practice location on file with NPPES is in Wauwatosa, WI. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.